<div class="main-menu">
   <?php
            /* Use menu */
            wp_nav_menu(array(
                'theme_location' => 'main-menu',
                'container' => '',
                'menu_id' => 'main-menu'
                    )
            );
            ?>
<!--   <ul class="menu group">
      <li><a href="#" title="#">Trang chủ</a></li>
      <li>
         <a href="#" title="#">Sản phẩm</a>
         <ul class="sub-menu">
            <li><a href="#" title="#">Áo đôi</a></li>
            <li><a href="#" title="#">Áo Thun Nam</a></li>
            <li><a href="#" title="#">Áo Thun Nữ</a></li>
         </ul>
      </li>
      <li  class="current-menu-item"><a href="#" title="#">Giới thiệu</a></li>
      <li><a href="#" title="#">Liên hệ</a></li>
   </ul>-->
</div>